Исходники иллюстрации

\documentclass[tikz]{standalone}\input{pre.tex}\begin{document}\begin{tikzpicture}[math3d]

    % \draw (0,0) node[transform shape, rotate=90, scale=2, blue] {$S$};
    \draw[pattern=north east lines, pattern color=blue] (0,0) rectangle (90pt,50pt);

    \draw[fill=white] (10pt,2pt) rectangle (80pt,50pt); 
    \begin{scope}
        \lineann[1]{90}{50pt}{H=50 mm}
    \end{scope}
    \begin{scope}[xshift=90pt, yshift=2pt]
        \lineann[-1]{90}{48pt}{h=48 mm}
    \end{scope}
    \begin{scope}[xshift=0pt, yshift=-10pt]
        \lineann[0]{0}{90pt}{2R=90 mm}
    \end{scope}
    \begin{scope}[xshift=10pt, yshift=50pt]
        \lineann[0.5]{0}{70pt}{2r=70 mm}
    \end{scope} 
% Draw line annotation
% Input:
%   #1 Line offset (optional)
%   #2 Line angle
%   #3 Line length
%   #5 Line label
% Example:
%   \lineann[1]{30}{2}{$L_1$}


\end{tikzpicture}\end{document}